Chemistry Midterm Review

Front

The atomic mass of an element is the ___

Back

weighted average of the masses of the isotopes of the element

Front

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number?

Back

25

Front

An atom is electrically neutral when ___

Back

protons and electrons are the same

Front

A measure of the average kinetic energy of the particles in an object is called ___

Back

Temperature

Front

In which segment is the kinetic energy remaining constant?

Back

B-C

Front

What is the definition of atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is the definition of isotopes?

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is the formula for calculating mass number?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the definition of kinetic energy?

Back

The energy that an object possesses due to its motion.

Front

What is the relationship between temperature and kinetic energy?

Back

Temperature is a measure of the average kinetic energy of particles in a substance.